Roland Music - Page 3 - Recent Questions, Troubleshooting & Support
A musician friend of mine
Diagram is NOT likely to help much. Look for bad soldering at the input and output jacks AND by the power input jacks. Also look for cracked circuit board and or lifted circuit etch. Lastly, the pots and the soldering around them may be part of the problem. Most of the mentioned things are 95% of the problem.
I have a Roland AC-90.
I would expect there is bad soldering or a circuit board crack. Inspect the soldering aound the leads, especially pots and heavy components. Finding all the retaining screws can be frustrating. Expect the screws for the handle to also attach to the amp chasis. They are often hiodden under plastic caps.
Roland 150 amp makes a buzz sometimes. But cables are fine
there are spraycans of cleaner that u can buy to cure it. sounds like dirty pots like maybe your volume pot on your amp or the pots on the instruments your playing. get the cleaner ,spray in the pots and move them back and forth and thats it. my marshall amp was doing the same and that was my cure. i dont remember the name of it but phone long and mcquade or another store and ask. hope that helps ya.
10/7/2020 9:20:55 AM •
Roland Music
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Answered
on Oct 07, 2020
Were is the main fuse on a roland ba-330
I have no idea. It is possible to download the user manual but it does not even include the word "fuse" in the entire document. US customer support for operations of these Japanese products is as follows: For operational assistance, you can contact Product Support department at (323) 890-3740. Product Support is open Monday through Friday, 8:30am to 5:00pm Pacific Time. Phone support is provided for select Roland and BOSS products purchased in the U.S. only. But I do note this specifies operational support. The Roland site does offer a user manual but not a service manual.
8/4/2020 4:57:55 AM •
Roland Music
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Answered
on Aug 04, 2020
Hi, My Roland Fantom G6
Does the headphone jack work? Replacing a whole board would be expensive and the problem could be elsewhere. What was the accident? If large signals were driven back into the audio out lines, probably the output driver chip is fried... They likely use a common 8 pin dual op amp as the driver and the part costs 50 cents. It takes a little care to replace it as it is likely surface mounted. I am looking at the audio/jack board for a G-600 and there are a pair of transistors for some testing they do that could also be fried and might be the whole problem if the G-6 uses same or similar circuitry. The Fantom X6 uses very similar circuitry... Download service manual here:
http://elektrotanya.com/roland_fantom-x6.pdf/download.html
Scroll down to "get manual" and click to download. IGNORE other download links. On page 57 of 66 you will find the audio drivers at the right. They use little dual op amps M5218APF which probably are available someplace, however probably 4568's would work fine and are readily available. If you drove high voltage into the audio outs, I suspect first that the RF bypass caps such as C203 on the above schematic shorted. Simple to replace... pennies apiece... The test path transistors such as Q37 may also be shorted... Next would be IC18... While this circuit may not be the exact one for the G6 it probably is CLOSE as the several Rolands all seem to use similar circuitry. Regarding system SAFETY... Make sure ALL and I do mean ALL equipment interconnected including mixers, powered speakers, keyboards, etc. are powered from the SAME receptacle or power conditioning module to avoid accidents. Also for keyboards sent to mixers, USE DI boxes please! These protect against ground loops and these accidents.
Fix a Boss GT-10 broken input jack
what is your question?
if not working, you have to open the device and find out where it is not connecting (broken solder joint? bent or worn out contacts? wire off?) and repair. or if beyond repair, order a new part.
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